KDE 4.2 RC1 not working

hi all,I updated KDE this morning to KDE 4.2 RC1, first of all, I had to yaourt -Suf to update due to errors without the force option. I then rebooted but all I get is the background image, plasma just doesn't show up. I can't get a menu from a right click neither... I tried deleting my .kde and .kde4 folders in my /home, but that doesn't change anything. I am now stock using TWM